calcium pump

calcium pump
the mechanism of active transport of calcium (Ca2+) across a membrane, as of the sarcoplasmic reticulum of muscle cells, against a concentration gradient; the mechanism is driven by the hydrolysis of ATP by the membrane-bound enzyme Ca2+-ATPase.

Medical dictionary. 2011.

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  • calcium pump — A transport protein responsible for moving calcium out of the cytoplasm. See calcium ATPase …   Dictionary of molecular biology

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  • Calcium in biology — Calcium (Ca2+) plays a vital role in the anatomy, physiology and biochemistry of organisms and of the cell, particularly in signal transduction pathways. The skeleton acts as a major mineral storage site for the element and releases Ca2+ ions… …   Wikipedia

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  • pump — 1. An apparatus for forcing a gas or liquid from or to any part. 2. Any mechanism for using metabolic energy to accomplish active transport of a substance. breast p. a suction instrument for withdra …   Medical dictionary

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  • Biological pump — In oceanic biogeochemistry, the biological pump is the sum of a suite of biologically mediated processes that transport carbon from the surface euphotic zone to the ocean s interior. OverviewThe organic carbon that forms the biological pump is… …   Wikipedia

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